English edit

 
Cyclist wearing a bicycle helmet.

Noun edit

bicycle helmet (plural bicycle helmets)

  1. A helmet intended to be worn while riding a bicycle.
    • 1989 (Jul), Dennis Coello, "Lock Up Your Bike", Boys' Life, page 8
      Make locking up your bike as routine as strapping on a bicycle helmet.
    • 2004, World Health Organization, World Report On Road Traffic Injury Prevention, page 136:
      Mandatory bicycle helmet laws introduced in New Zealand in 1994 also resulted in large increases in helmet use, and reductions in the number of head injuries []

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